Smooth high-speed centrifugal water injection pump

Abstract

The invention discloses a stable high-speed centrifugal water injection pump, which includes a pump cover (5), a housing assembly, a rotor assembly, a bearing assembly, and a mechanical seal assembly (2). The housing assembly includes a suction box body that is connected in sequence. (3), the middle section (8), the middle section of the final stage (10), the guide vane (16) and the final stage guide vane (11). The hydraulic inlet and outlet direction angle of the guide vane and the final stage guide vane is from the first stage. Each stage from the guide vane to the final stage guide vane is arranged to rotate in increments of 10° to 15°. The invention can effectively balance the huge hydraulic impact thrown out by each guide vane in all directions, thereby greatly reducing the hydraulic impact caused by the pump operation and causing the pump to vibrate, effectively improving the reliability and stability of the pump and enabling the pump to be balanced. Efficient operation and reduced pump noise and vibration.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to a high-speed centrifugal water injection pump. Background technique [0002] In foreign-related oilfield projects, we often encounter problems with the selection of small flow and high-lift centrifugal water injection pumps, because foreign-related oilfields have the characteristics of small water injection volume, high water injection pressure, and contain a large amount of chloride ions and minerals. Especially for oil fields located in the deserts of the Middle East (such as Yada Oilfield in Iran), the rated water injection volume of a single well is 50m 3 / h, the outlet water pressure is 30MPa, and the chloride ion concentration can reach 165000mg / L. [0003] The centrifugal pump operates under this working condition, and the existing centrifugal pump with a rotating speed of 2980r / min cannot meet its performance requirements, and the general stainless steel material cannot meet its cor...

AI Technical Summary

Problems solved by technology

[0003] The centrifugal pump operates under this working condition, and the existing centrifugal pump with a rotating speed of 2980r / min cannot meet its performance requirements, and the general stainless steel material cannot meet its corrosion resistance requirements.

If the centrifugal pump chooses the plunger pump, due to the high-speed continuous friction between the plunger valve and the pump cylinder during the operation of the plunger pump, the corrosion resistance of the pump cylinder and the valve body surface of the plunger valve will drop sharply, etc. , and cannot meet the corrosion resistance requirements for conveying high chloride ion content

Especially for such a large plunger pump, its noise and vibration will be much larger than that of ordinary centrifugal pumps, and it is difficult to guarantee the life of each friction pair

In addition, the plunger pump has many wearing parts. Even if it is in normal operation, the cost of replacing parts is very expensive. For the plunger pump made of duplex stainless steel, the cost of replacing parts is even greater.

Images